Lathe spindle stop



Gd- 24l 1944- s. R. .CARLSON I 329361035 LATHE SPINDLE STOP Filed March 4. 1943 2 Sheets-Sheet l Carlson BY @MQ ATTORNEY 0t.24, 1944. SRCARLSON a 2,361,085'

LATHE SPINDLE STOP Filed March 4, 1943 4 2 Sheets-Sheet 2 21a h-q :i f E sym ze. clv T-151- 5 BY AT TOR/VE Y vbolt outwards as the :rod 'is moved forwards.

Patented Oct. 24, 1944 UNETESD 'STATES PAT EN? G lT-F-IUE LATHE SPINDLE S'TOP Sven R. Carlson, FloralPark, N. Y.

Applicationlvlarch 14, 1943,;Serial No. 477,920

9 Claims.

This invention relates to new yand useful iim- :provements in a latherspindletop.

More particularly, the invention proposes ;a stop intended particularly to ,begused inthe hollow spindle of a lathe'. `The purpose p,of this stop is to limit the distance to which work vwhich .is tobe operated 4upon by thelathe can be placed into the hollow spindle. v

The invention proposes to charaoterizethestop byan elongated member adapted to slidablyzengage in the hollow spindle Vsothatfit may be .the face of the bore of the hollow spindle `,for locking the'elongated member 1in position.

The invention `further contemplates the provision of arod coaXially-slidably mounted in the member and having .cam elements ycooperative with cam elements on the bolt .for forcing the It `is proposed lthat the elongated member vbe provided with 4a screw engaging the rod fbygwhich the rod maybe forced forwards.

Still further the Vinvention contemplates various modified forms distinguishing'fromeachother in the latching mechanism for securely yholding the elongated member in position.

For further comprehension ofzthe invention, and of the objects and advantages thereof', reference will be had to the following description and accompanying drawings, Vand to :the appended claims in which the various novel features of the invention are more particularly -set forth.

In the accompanying drawings forming a 'mavterial part of this disclosure: l

-sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is a perspective 'view of the rod used in =the locking mechanism.

,Fig. 5 is a perspective view of `:the friction `op erative bolt.

Fgp is a fragmentarysectional,viewfsi-milar to Fig. 2 but illustrating a modified construction.

Fig. .7 is a perspective View :ofthe Arod used in Fig; 6.

Fig. :.8 is .another fragmentary :sectional .view, similar to Figu2 rbut illustrating another .modied formof the invention.

Fig. 9 is a perspective view oi lthe-rod `usedin Fig. 8.

.In Fig. .la lathe Hl is schematicallyillustrated. rllhis lathe ,-is of atype havinga hollowspindle .ll into which Work may beengaged. l"Ihisiwork may be gripped and yheld y.by the .usual chuck -orzother holding means. -The particular `details vof the lathe .and spindle lform no part of zthe invention. Theiinvention yresidesin theiconstruc'- tion of a. lathe spindle stop intended to-.be mount- (ed 4within Athe spindle l l, l.as clearly shown for .example :in Fig..2. In one form of this 'inven- .tion .this stop includes anyelongated member Vl2 adapted to slidably engage in the hollow :spin :dle lil. An abutment t3 for the work is adjustably `mountedvon the front end of the mem '.ber l2. This abutment is in :the nature of a screw threadedly engaged inethefrontfend ofithe .member l2. A nut vlifl threadedly engages the .cscrew I3 ,and abuts the end of `the member :l2 ifor holding 'the abutment member- .in selected projecting .positions on. the member .1.2.

.Aifriction operative bolt fizris transversely slid- -ably ,mountedon the sideof the .member l2 and :is 'for the v,purpose of engaging .the :face [6 Io'f the :bore :Vl vof the hollow spindle M. Theabolt t5 :has .ar-shoulder i8 llocated inwards of :and .cooperative vwith a shoulder i9 upon the side `of Vthe Aopening 1in the member vl?! through which :the bolt extends. These shoulders limit eXten- .lsionof the =bolt lso that it is not free to fall from rthe elongated member `I2 when the spin- :dle stop is rnot being used.

.A .rod 2li is .coaXially slidably mountedin the -mernber ft2. This trod is shown square .in transzverse cross `section,:thougli this is ymerely a mat .ter of design .as it may be-of different shapes. Cooperative cam elementsZl and 122 are vformed on the '.rod :20 vand lthe bolt l5 for forcing :the l,bolt outwards, as the rod is moved forwards. These cooperative cam elementsareiinlthe nature rof `inclined.complementar-*yfaces. :Ayscrew l21? is .threadedly mounted onithev rear endof the member I2 and abuts against the rod :2.0 fand :is `vfor :the Ypurpose of moving the ,rod `.forwards ito..eX

tend the bolt I5. This screw 23 has a socket opening 24 for a suitable turning tool by which the screw may be manipulated.

The operation of the device is as follows:

The screw 23 is loosened so that the rod 20 may move slightly rearwards freeing the bolt I which then may move inwards. The spindle stop may now be removed from the spindle II or maybe moved to a new selected position. If removed, the abutment member I3 may be adjusted, if this is desired, by extending or retracting it relative to the member I2.

The spindle stop may be fastened in any position within the hollow spindle I I merely by placing a rod through thefrontlend of the spindle II and against the abutment member I3 to lhold the spindle stop temporarily in position. YThen, with a turning tool engaged through the rear end of the spindle II, the screw 23 is turned inwards to move the rod forwards so that the cooperative cam elements 2| and 22 coact to extend the bolt I5. 'Ihe bolt is forced against the face of the bore ofthe spindle II, locking thespindle stop-in position.

The elongated member I2 is illustrated as formed with an insert I2' surrounding the bolt I5.

u `This is merely an expedient in manufacturing the tion has been disclosed which is very similar to the prior form, distinguishing merely in the fact that an auxiliary bolt I5' is slidably mounted upon the elongated member I5 diametricallyopposite to the bolt I5. A rod 20' is slidably mounted in the member I2 and is provided with a double cam 2 I cooperativewith the complementary cam elements 22 of the bolts I5. Inother respects this form of the invention is identical to the previous form and like parts are indicated by like reference numerals.

' The operation of this formof the invention is substantially identical to the `prior form, distinguishing merely in the fact that when the screw 23 isl driven forwards the rod 20' will be correspondingly moved and will simultaneously extend the bolts I5 and I5' againstthe opposite faces ofthe bore of the spindle II.. Thus, the spindle stop is more 'securely held in position.

InvFigs. 8 and 9 still another modied form of the invention is disclosed which distinguishes from the' form shown in Figs. 6 and '7 in the fact that auxiliary bolts I5a and I5b are used in addition to the bolts I5 and I5. These auxiliary bolts are spaced longitudinally of said bolts I5 and I5'. A rod 20e is slidably mounted on the member I2 and'is provided with a plurality of cam surfaces 2| cooperative with complementary cam surfaces ofthe various bolts for simultaneously extending the boltsk when the rod is moved forwards. When the rod is movedre'arwards the bolts are released.

While I have illustrated and described the prel ferred embodiments of my invention, it is to be lto elongated member adapted to slidably engage in said hollow spindle, an abutment for the work adjustably mounted on the frontend of said member, a friction operative bolt transversely slidably mounted upon the side of said member for engaging the face of the bore of said hollow spindle, a rod coaxially slidably mounted in said member, cooperative cam elements on rod and boli; for forcing the bolt outwards as the rod is moved forwards, and a screw mounted on the rear of said member for forcing said rod forwards.

2. In combination with a hollow spindle, an

f elongated member adapted to slidably engage in I said hollow'spindle, an abutment for the work adjustably mounted on the front end of said member, a friction operative bolt transversely slidably mounted upon the side of said member for engaging the face of the bore of said hollow spindle, a rod coaxially slidably mounted in said member, cooperative cam elements on rod and bolt for forcing the bolt outwards as the rod is moved forwards, and a screw mounted on the rear of said member for forcing said rod forwards, said abutment member comprising a screw threadedly engaged in the front of said member. 3. In combination with a hollow spindle, an elongated member adapted to slidably engage in said hollow spindle, an abutment for the work adiustably mounted on the front end of said member, a friction operative bolt transversely slidably mounted upon the side of said member for engaging the face of the bore of said hollow spindle, a rod coaxially slidably mounted in said member, cooperative cam elementson rod and bolt for forcingthe bolt outwards as the rod is moved forwards, and a'screw mounted on the rear of said `member for forcing said rod forwards, said abutment member comprising a screw threadedly engaged inthe front of said member, and a nut for locking said screwin adjusted position.

4. In combination with a hollow spindle, an elongated member adapted to slidably engage in said hollowspindle, an abutment forthe work adjustably mounted on'the front end of said member, a friction operative bolt transversely slidably mounted upon the side of said member for engaging the face of the bore of said hollow spindle, a rod coaxially slidably mounted in said member, cooperative cam elements on rod and bolt for forcing the bolt outwards as the rod is moved forwards, and a screw mounted on the rear of said member for forcing said rod forwards, said bolt being provided with a shoulder of an inner portion cooperative with a complementary outer shoulder on said elongated member for limiting extension of the bolt.'

y5. In combination with a hollow spindle, an elongated member adapted to slidably engage in said .hollow spindle, an abutment for lthe work adjustably mounted on the front end of said member, a friction operative bolt transversely slidably mounted upon the side of said member for engaging the face of the bore of said hollow spindle, a rod coaxially slidably mounted in said member, cooperative cam elements on rod and -bolt for forcing the bolt outwards as the rod is moved forwards, anda screw mounted on the rear of said member for forcing said rod forwards, said cam elements comprising. inclined surfaces.

6. In combination with a hollow spindle, an elongated member adapted to slidably engage in said hollow spindle, an abutment for the work adjustably mounted onA the front end ofv said rear of said member for forcing said rod forwards, said rod being non-circular in transverse cross section and engaging a complementary shaped opening in said member.

7. In combination with' a hollow spindle, an

elongated member adapted to slidably engage insaid hollow spindle, an abutment for the work adjustably mounted on the front end of said member, a friction operative bolt transversely slidably mounted upon the side of said member for engaging the face of the bore of said hollow spindle, a rodcoaxially slidably mounted in said member, cooperative cam elements on rod and bolt for forcing the bolt outwards as the rod is moved forwards, a screw mounted on the rear of said member for forcing said rod forwards, and auxiliary bolts transversely slidably mounted on said member for engaging the face of the bore of said hollow spindle at various points, said rod being provided with auxiliary cams cooperative with cam elements on the auxiliary bolts for simultaneously forcing the bolts outwards as the rod is moved forwards.

8. In Combination .with a hollow spindle, an elongated member adapted to slidably engage in said hollow spindle, an abutment for the work adjustably mounted on the front end of said member, a friction operative bolt transversely sildably mounted upon the side of said member for engaging the face of the bore of said hollowv spindle, a rod coaxially slidably mounted in said member, cooperative cam elements on rod and bolt for forcing the bolt outwards as the rod is moved forwards, a screw mounted on the rear of said member for forcing said rod forwards, and auxiliary bolts transversely slidably mounted on said member for engaging the face of the bore of said hollow spindle at various points, said rod being provided with auxiliary cams cooperative with cam elements on the auxiliary bolts for simultaneously forcing the bolts outwards as the rod as moved forwards, said bolts being diametrically opposite each other.

9. In combination with a hollow spindle, an elongated member adapted to slidably engage in said hollow spindle, an abutment-for the work adjustably mounted on the front end of said member, a friction operative bolt transversely slidably mounted upon the side of said member for engaging the face of the bore of said hollow spindle, a rod coaxially slidably mounted in said member, cooperative cam elements on rod and bolt for forcing the bolt outwards as the rod is moved forwards, a screw mounted on the rear of said mem-ber for forcing said rodforwards, and auxiliary bolts transversely slidably mounted on said member for engaging the face of the bore of said hollow spindle at various points, said rod being provided with auxiliary cams cooperative with cam elements on the auxiliary bolts for simultaneously forcing the bolts outwards as the rod is moved forwards, said bolts being longitudinally spaced of each other.

SVEN R. CARLSON. 

